Stoat (formerly known as Revolt) is a selfhostable, FOSS replacement for discord [Group chats and voice channels you can join any time].

Cool new name, however not as easy to use in other languages.

Voice chat is stil not officialy implemented.

Self-hosting there. Apparently nothing to do for you if you had already hosted before the name change.

The Android app has unfortunately disappeared (not been updated) on F-droid.

Edit: added short description for clarification

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what's really federation on a system that isolates conversations per server?

That's like asking why Lemmy needs federation if posts are tied to a Community.

No federation means:

  • Every server requires a different user account to join a room
  • Every server needs to be accessed from a different URL
  • Users in different servers cannot direct message, call, or friendlist one another

Federated platforms aren't perfect, but they solve these problems.

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